The upgrade to the MC4, the MC4S is a smart charger with new features • USB Type-C input, Li-ion & Ni-MH available • Supports 2x1A and 4x0.5A charging current • Max two 18650 + two unprotected 21700 batteries • Independent 4-slot, support mixed charging • High-precision cut-off after fully charged, prolonged battery life • Protections for anti-reverse, over-charge, short-circuit, over-voltage, etc. • Current adaptive, higher charging efficiency • 0V activation for over-discharged batteries Need less charging capability? Check out the following chargers: Xtar MC1